CN110214413A - The control device and control method of electricity generation system - Google Patents
The control device and control method of electricity generation system Download PDFInfo
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- CN110214413A CN110214413A CN201880008757.1A CN201880008757A CN110214413A CN 110214413 A CN110214413 A CN 110214413A CN 201880008757 A CN201880008757 A CN 201880008757A CN 110214413 A CN110214413 A CN 110214413A
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- voltage
- generator
- target voltage
- revolving speed
- detected value
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The control device (4) of electricity generation system (1) includes the target voltage adjustment unit (43) of the target voltage (Vr) of adjustment generator (3).Target voltage adjustment unit (43), which is included, is connecting load to generator (3) by breaker, the detected value (Sm) of the revolving speed (S) of gas engine (2) declines below when allowing change value, the voltage decline function of declining the target voltage (Vr) of generator (3) according to the slippage of the detected value (Sm) of the revolving speed (S)；And the target voltage (Vr) of generator 3 decline below allow lower voltage limit based on determined by the output voltage (V) allowed for the normal operation loaded in the case where, the target voltage (Vr) of generator (3) is maintained allow lower voltage limit voltage maintain function.
Description
Technical field
The present invention relates to the control device of electricity generation system and control methods.
Background technique
By the electricity generation system that the burning of engine carries out electrical power generators be used for recyclable engine cooling heat and
The co-generation unit etc. of the exhaust heat of engine.In addition, electricity generation system is also configured to be associated with source power supply sometimes, to logical
The various loads for crossing source power supply movement supply electric power, and supply electric power in the power failure of source power supply to important load.
In the power failure of source power supply, by the power supply of the generator of electricity generation system generation to when loading, because to hair
The load of motor investment sharply, the revolving speed of engine temporarily declines sometimes.In this case, by by being connected on generator
Automatic tension regulator, decline the target voltage of generator according to the slippage of the revolving speed of engine, so as to starting
Machine does not generate excessive burden.Hereby it is achieved that the inhibition of the decline of the revolving speed of engine, shortens turning for engine in addition, realizing
The recovery time of speed.As such automatic tension regulator, for example, there is the control for diesel power generation equipment of patent document 1
The automatic tension regulator of method and device processed.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Application 59-59098 bulletin
Summary of the invention
Subject to be solved by the invention
However, in the adjustment of the target voltage for the generator for having used automatic tension regulator, if being born to generator
The input amount of load is big, then the output voltage excessive descent of the target voltage and tracking target voltage that have generator extremely needs above
Misgivings.In this case, excessive burden can not be generated to engine, on the other hand, as original purpose, without normal
Ground carries out having the misgivings for the normal operation that can not can be carried out load to the power supply of load from generator.
The present invention is completed in view of such project, by the target voltage for suitably setting generator, it is possible to provide can
The decline of the revolving speed of engine is suppressed to minimum limit, protects engine from overload, while shortening the revolving speed of engine
Recovery time, and can be from the control dress of the electricity generation system of electric power required for the normal operation that generator supplies for load
It sets and control method.
Solution for solving the problem
A mode of the invention is that the power generation of generator is carried out for the burning by engine, logical from the generator
The control device for the electricity generation system that breaker is supplied electric power to load is crossed,
The control device includes: automatic voltage adjustment unit, is controlled, so that the output voltage of the generator is
The target voltage of the generator；And target voltage adjustment unit, the target voltage of the generator is adjusted,
The target voltage adjustment unit includes
It is loaded being connected by the breaker to the generator, the frequency of the revolving speed of the engine or the generator
The detected value of any one of rate declines below when allowing change value, makes the target voltage of the generator according to the detection
The slippage of value and the voltage decline function of declining；
The target voltage of the generator declined according to the slippage of the detected value decline below based in order to
Carry out the normal operation of the load and the output voltage allowed determined by allow lower voltage limit in the case where, by the power generation
The target voltage of machine is maintained described and allows lower voltage limit or based on lower limit under the voltage of the value for allowing lower voltage limit to determine
Function processed；And
The detected value decline below it is described allow that the detected value rises again after change value when, make the power generation
The voltage until voltage rating when the target voltage of machine rises to steady running rises function.
Another way of the invention is to carry out the power generation of generator by the burning of engine, pass through from the generator
The control method for the electricity generation system that breaker is supplied electric power to load,
It is being controlled, when so that the output voltage of the generator being the target voltage of the generator, is including:
It is loaded being connected by the breaker to the generator, the frequency of the revolving speed of the engine or the generator
The detected value of any one of rate declines below when allowing change value, makes the target voltage of the generator according to the detection
The voltage lowering action of the slippage decline of value；
The target voltage of the generator declined according to the slippage of the detected value decline below based in order to
Carry out the normal operation of the load and the output voltage allowed determined by allow lower voltage limit in the case where, by the power generation
The target voltage of machine is maintained described and allows lower voltage limit or based on lower limit under the voltage of the value for allowing lower voltage limit to determine
Braking is made；And
The detected value decline below it is described allow that the detected value rises again after change value when, make the power generation
The voltage vertical motion until voltage rating when the target voltage of machine rises to steady running.
Invention effect
In the control device of electricity generation system and control method, loaded being connected by breaker to generator, engine
Revolving speed or the detected value of any one of frequency of generator decline below when allowing change value, make the target electricity of generator
Decline at all according to the slippage of detected value.Thus, it is possible to prevent the output voltage for generator from being target voltage and to starting
Machine generates excessive burden, and protection engine is from overload.Furthermore, it is possible to which the decline of the revolving speed of engine is suppressed to irreducible minimum
Degree, can shorten the recovery time of the revolving speed of engine.
In addition, the amount for declining the target voltage of generator is limited in the control device of electricity generation system and control method,
So that the normal operation of load will not can not be can be carried out.Specifically, the target voltage in generator declines below and is based upon
In the case where allowing lower voltage limit determined by the normal operation that is loaded and the output voltage allowed, by the mesh of generator
Mark voltage, which is maintained, allows lower voltage limit or based on the value for allowing lower voltage limit to determine.Thus, it is possible to by the target electricity of generator
The output voltage of pressure and tracking target voltage maintains the normal operation in order to be loaded and the value that needs.
In addition, in the control device of electricity generation system and control method, in the frequency of the revolving speed or generator of engine
The detected value of any one declines below allow change value after, when detected value rises again, make the target voltage of generator
Rise to voltage rating when steady running.Thus, it is possible to connect the generating state of generator to generator from by breaker
Unstable transition state after connecing load is restored to stable state, to load stabilization supplies electric power from generator.
More than, according to the control device and control method of electricity generation system, the target voltage by generator is suitably set
It is fixed, the decline of the revolving speed of engine can be suppressed to minimum limit, protection engine shortens engine from overload
The recovery time of revolving speed, and electric power required for the normal operation from generator supply for load.
Detailed description of the invention
Fig. 1 shows the explanatory diagrams of the structure of the electricity generation system of embodiment.
Fig. 2 indicates the control block diagram of the control structure of the electricity generation system of embodiment.
Fig. 3 indicates the curve graph of the relational graph between the revolving speed and target voltage of embodiment.
Fig. 4 indicates the curve graph of another relational graph between the revolving speed and target voltage of embodiment.
Fig. 5 indicates the flow chart of the control method of the electricity generation system of embodiment.
Fig. 6 indicates the subsequent flow chart of the control method of the electricity generation system of embodiment.
Fig. 7 indicates the subsequent flow chart of the control method of the electricity generation system of embodiment.
Fig. 8 shows another subsequent flow charts of the control method of the electricity generation system of embodiment.
Fig. 9 indicates the stream of the revolving speed of the electricity generation system of previous embodiment, target voltage, output voltage, fuel gas
The curve graph of the Temporal changes of amount.
Figure 10 indicate the revolving speed of electricity generation system of embodiment, target voltage, output voltage, fuel gas flow when
The curve graph of intersexuality variation.
Specific embodiment
It is described with reference to the preferred embodiment of the control device of electricity generation system above-mentioned.
As shown in Figure 1, the control device 4 of the electricity generation system 1 of the method is used to include gas engine 2 and generator 3
Electricity generation system 1.Electricity generation system 1 is configured to carry out the power generation of generator 3 by the burning of gas engine 2, passes through from generator 3
Breaker 5 is supplied electric power to load 7.As shown in Fig. 2, control device 4 includes: automatic voltage adjustment unit 42, controlled, is made
The output voltage V for obtaining generator 3 is the target voltage Vr of generator 3；And target voltage adjustment unit 43, adjust generator 3
Target voltage Vr.
Target voltage adjustment unit 43 has the function of that voltage decline, voltage decline limitation function and voltage rise function.
That is, target voltage adjustment unit 43 be configured to have Fig. 3 and it is aftermentioned as shown in Figure 4, between revolving speed and target voltage
Relational graph is based on this relational graph, by adjusting the target voltage of generator 3 corresponding with the revolving speed of gas engine 2, plays
Above-mentioned voltage decline function, voltage decline limitation function and voltage rise function.
As shown in figure 3, voltage decline function is, 7 are being loaded to the connection of generator 3 by breaker 5, gas engine 2
The detected value Sm of revolving speed (revolution) S decline below when allowing change value S1, make the target voltage Vr of generator 3 according to this turn
The function of the slippage decline of the detected value Sm of fast S.
Voltage decline limitation function is, in the target electricity according to the generator 3 of the slippage decline of the detected value Sm of revolving speed S
Pressure Vr decline below based in order to carry out the normal operation of load 7 and the output voltage V that allows determined by allow under ration the power supply
In the case where pressing V1, the target voltage Vr of generator 3 is maintained to the function of allowing lower voltage limit V1.Voltage rises function,
The detected value Sm of revolving speed S decline below allow change value S1 after detected value Sm rise again when, make generator 3 target electricity
The function until voltage rating V0 when Vr being pressed to rise to steady running according to the ascending amount of detected value Sm.
Furthermore the detected value Sm of revolving speed S is known as revolving speed Sm sometimes, it is sometimes that the detected value Vm of output voltage V is referred to as defeated
Voltage Vm out.
Hereinafter, the control device 4 and control method of the electricity generation system 1 of the method is described in detail.
As shown in Figure 1, the electricity generation system 1 of the method includes: to be burnt by the mixed gas of fuel gas and air
, fixed gas engine 2；The output shaft for linking gas engine 2, the power generation for receiving the rotation of the output shaft and generating electricity
Machine 3；And the control device 4 of the movement of control gas engine 2 and generator 3.In gas engine 2, it is equipped with adjustment pair
Gas engine 2 multiple cylinders supply gaseous mixture flow throttle valve 21, detect gas engine 2 revolving speed S turn
Fast table (revolution detector) 22 etc..In generator 3, the voltmeter (voltage detecting of the output voltage V equipped with detection generator 3
Device) 31 etc..
Furthermore revolution counter 22 is also arranged on 3 side of generator sometimes.
In addition, control device 4 also can detecte the frequency of generator 3, replace the revolving speed S of detection gas engine 2.Power generation
The frequency of machine 3 is directly proportional to the revolving speed S of gas engine 2.Therefore, electricity generation system 1 also can be used frequency substitution revolving speed S and carry out
Control.That is, the frequency that its X-axis can also be set as to generator 3 replaces revolving speed in Fig. 3 and aftermentioned relational graph shown in Fig. 4
The detected value Sm of S.
In addition, the frequency that the voltage decline function of target voltage adjustment unit 43 also can detecte generator 3 declines low
In allowing change value, replaces the detected value Sm of the revolving speed S of detection gas engine 2 to decline below and allow change value S1.Because
The decline of the revolving speed S of gas engine 2 is to decline the frequency of generator 3.
Used in the voltage decline function of target voltage adjustment unit 43, revolving speed S allow change value S1 for example can be with
The value being set as in the range of rated value i.e. the 99.9~90% of rated speed S0 of revolving speed S.Detect the case where frequency replaces revolving speed S
It is also same.
The rated speed S0 of gas engine 2 based on the design specification of gas engine 2 is confirmed as that combustion gas can be carried out
The value of the reasonable employment of engine 2.The voltage rating V0 of generator 3, based on the design specification of generator 3, being confirmed as can be into
The value of the reasonable employment of row generator 3.
Can be suitably set according to the type of load 7 in the voltage decline limitation function of target voltage adjustment unit 43 makes
Allow lower voltage limit V1.For example, the case where normal operation as load 7 becomes difficult, allows lower voltage limit V1 can be with
It is set as value of the voltage used in load 7 in the range of loading the 60~95% of voltage rating of 7 when decline.
As shown in Figure 1, the object supplied electric power by the generator 3 of electricity generation system 1 load 7 it is usual when pass through source power supply
6 are acted.Electricity generation system 1 has in the power failure of source power supply 6, the function as the backup power source for replacing source power supply 6.
The output terminal of wiring and generator 3 between source power supply 6 and the input terminal for loading 7 and the input terminal of load 7
Between wiring in, configure the switching that either party or two sides of source power supply 6 and generator 3 can be attached to load 7
Breaker 5.The control device 4 of electricity generation system 1 can operating breaker 5.
Electricity generation system 1 may be constructed to be generated electricity using gas engine 2 and generator 3, recycles the cold of gas engine 2
But the co-generation unit of heat and the exhaust heat being discharged from gas engine 2.Electricity generation system 1 is arranged in factory, facility etc..
Electricity generation system 1 is also configured to be associated with source power supply 6, supplies electric power to load 7.
As the load 7 for receiving power supply from electricity generation system 1, there are the power-equipment of pump, fan etc., large size and small-sized
Various computers, various control equipment, various electric equipment products, illumination, air-conditioning device etc..Moreover, in order to carry out the normal of load 7
Operate the control dress allowed lower voltage limit V1, can particularly be set as making the load 7 of various 7 operatings of load allowed
Required voltage in the movements such as control relay, the sequencer set.
As shown in Fig. 2, control device 4 other than automatic voltage adjustment unit 42 and target voltage adjustment unit 43, is gone back
Target voltage setup unit 41 including setting the target voltage Vr of generator 3, and the aperture of adjustment throttle valve 21 to fire
The revolving speed S of gas engine 2 is the revolving speed adjustment unit 44 of rated speed S0.
In target voltage setup unit 41, it is set the target of the generator 3 when supplying electric power from generator 3 to load 7
Voltage Vr.Moreover, automatic voltage adjustment unit 42 adjusts the field supply of generator 3, so that by target voltage setup unit 41
The deviation Ev of the target voltage Vr of setting and the output voltage detected by voltmeter 31 (detected value of output voltage) Vm disappear.
The revolving speed S of gas engine 2 is set, and makes its rated speed S0, and revolving speed adjustment unit 44 adjusts throttle valve 21
Aperture so that the deviation Es of rated speed S0 and the revolving speed detected by revolution counter 22 (detected value of revolving speed) Sm disappear.
In addition, the output voltage V of generator 3 changes because of the revolving speed S of gas engine 2, the field supply root of generator 3
It is adjusted according to the deviation Ev of target voltage Vr and output voltage Vm.
As shown in Fig. 2, the revolving speed Sm detected by revolution counter 22 is also read into target voltage adjustment unit 43.In target voltage
In adjustment unit 43, the revolving speed Sm of revolution counter 22 decline below allow change value S1 in the case where, according under revolving speed Sm
Drop amount declines target voltage Vr.
The adjustment of in target voltage adjustment unit 43, generator 3 target voltage Vr uses expression gas engine 2
Revolving speed Sm and adjustment corresponding with the variation of revolving speed Sm generator 3 target voltage Vr between relationship relational graph M1, M2 into
Row.In addition, being set and being adjusted based on relational graph M1, M2 by target voltage adjustment unit 43 in target voltage setup unit 41
Generator 3 target voltage Vr.Moreover, automatic voltage adjustment unit 42 is exported according to the target voltage Vr of new settings
The control of voltage V.
Fig. 3 indicates relational graph M1, M2 stored in target voltage adjustment unit 43.In this mode, at revolving speed Sm
In the case where the case where drop and revolving speed Sm rise, keep the speed for changing target voltage Vr different.Specifically, voltage rises function
In, the rising gradient of the ascending amount of the target voltage Vr relative rotation speed Sm of generator 3 is than in voltage decline function, generator
The downward gradient of the slippage of 3 target voltage Vr relative rotation speed Sm is gentle.
Be connected in generator 3 load 7 when, revolving speed Sm decline below allow change value S1 when, by making target
Voltage Vr promptly declines, and inhibits the decline of the revolving speed S of gas engine 2.On the other hand, load 7 is connected in generator 3
Afterwards, when the revolving speed S for making gas engine 2 rises, if rising target voltage Vr sharp, there is the combustion of gas engine 2
The burden of burning becomes larger, the misgivings that the revolving speed S of gas engine 2 declines instead.Therefore, by keeping the revolving speed S of gas engine 2 flat
Rise slowly, reduces the burden of gas engine 2, protection gas engine 2 is from overload.
As shown in the drawing, relational graph M1, M2 of the method is by the decline relational graph M1 and revolving speed in the case of revolving speed Sm decline
Elevational relationship figure M2 in the case of Sm rises is formed.There is decline relational graph M1 revolving speed Sm to be respectively at 3 ranges R1, R2, R3
In the case where revolving speed Sm and target voltage Vr between relational expression.Elevational relationship figure M2 indicates to decline below appearance in revolving speed Sm
Perhaps the relational expression after change value S1, when revolving speed Sm rises again.
In decline relational graph M1, it is to allow change value S1 or more that the 1st range R1 of revolving speed Sm, which is set to revolving speed Sm,
In range, in other words, rated speed S0 when being set to steady running allow the rate of change in the range of.In the 1st range
In R1, the variation regardless of revolving speed Sm, target voltage Vr is maintained voltage rating V0 when steady running.
In addition, the 2nd range R2 of revolving speed Sm be set to revolving speed Sm lower than allow change value S1 and with allow under ration the power supply
It presses in the corresponding range for allowing lower limit rotating speed S2 or more of V1.In the 2nd range R2, forms revolving speed Sm and more decline, target voltage
Proportionate relationship between Vr the revolving speed Sm more declined and target voltage Vr.2nd range R2 is the range for executing voltage decline function,
In the 2nd range R2, drastically decline target voltage Vr according to the slippage of revolving speed Sm.
Furthermore the relationship between the revolving speed Sm and target voltage Vr in the 2nd range R2 is not necessarily required to be set as proportionate relationship, only
If revolving speed Sm more declines, the relationship that target voltage Vr more declines, such as it is also possible to the relationship of curve.
In addition, the 3rd range R3 of revolving speed Sm is set to revolving speed Sm lower than in the range of allowing lower limit rotating speed S2.The 3rd
In range R3, even if revolving speed Sm drops below the speed for allowing lower limit rotating speed S2, target voltage Vr is also maintained to be allow under
Voltage limit V1.3rd range R3 is the range for executing voltage decline limitation function.
When being connected to load 7 on generator 3, the revolving speed Sm of gas engine 2 changes according to the load state of load 7
Where is decline.Moreover, the ratio that the elevational relationship figure M2 of the method is set to revolving speed Sm more climbing target voltage Vr more rises
Example relationship.The rate of climb (rising gradient) of target voltage Vr in elevational relationship figure M2 is configured such that less than decline relationship
Scheme the decrease speed (downward gradient) of the target voltage Vr of the 2nd range R2 in M1.The method is executed by elevational relationship figure M2
Voltage rise function.
Rise in function in voltage, target voltage Vr can be made using the decline maximum value that revolving speed Sm declines as starting point
It restores (rising).In the elevational relationship figure M2 of Fig. 3, target voltage Vr is returned into the terminal of voltage rating V0 with revolving speed Sm's
Relation line when allowing change value S1 consistent is expressed as relation line a.In relation line a, by as make target voltage Vr rise
The revolving speed Sm of starting point is expressed as starting point revolving speed S3.
When being connected to load 7 on generator 3, starting point revolving speed S3 is declined below in the revolving speed Sm of gas engine 2
In the case where, after revolving speed Sm rises to starting point revolving speed S3, target voltage Vr can be risen based on elevational relationship figure M2.This
Outside, in this case, target voltage Vr can also be using the decline maximum value of the revolving speed Sm of gas engine 2 as starting point, base
Rise in elevational relationship figure M2.
In addition, in the elevational relationship figure M2 of the method, when being connected to load 7 on generator 3, even combustion gas is started
In the case that the revolving speed Sm of machine 2 does not decline below starting point revolving speed S3, until revolving speed Sm is restored to rated speed S0, all
Target voltage Vr can be made to be restored to voltage rating V0.In Fig. 3, the elevational relationship figure M2 of such case as relation line b, c,
D is shown.Particularly, relation line d indicates the case where decline maximum value of revolving speed Sm not up to allows lower limit rotating speed S2.
According to the value (difference for allowing change value S1 of rated speed S0 and revolving speed Sm) and elevational relationship for allowing change value S1
Scheme M2 in target voltage Vr the rate of climb between relationship, in elevational relationship figure M2, until revolving speed Sm be restored to it is specified
Until revolving speed S0, there is the case where target voltage Vr can not be made to be restored to voltage rating V0.Such case, as shown in figure 4, allowing
The rate of climb of target voltage Vr in the case where change value S1 is set as close to rated speed S0, elevational relationship figure M2 is more
It waits and generates in slow situation.
In the figure, in the smaller situation of revolving speed Sm in the revolving speed Sm decline of gas engine 2, declining maximum value
(situation more than the slippage of revolving speed Sm) is based only upon the mesh that elevational relationship figure M2 determines elevational relationship figure M2 as shown in relation line e
Mark voltage V.But in the case where the revolving speed Sm for declining maximum value is small without that youngest (the few situation of the slippage of revolving speed Sm),
As shown in relation line f, g, h, until revolving speed Sm is restored to rated speed S0, the target voltage Vr of elevational relationship figure M2 all without
Method makes target voltage Vr be restored to voltage rating V0.
Using the elevational relationship figure M2 of relation line f, g, h, voltage rises function in addition to utilizing elevational relationship
Scheme other than M2, also utilizes timer function N.That is, target voltage adjustment unit 43 has timer (not shown), it should by basis
Timer adjusts target voltage (making its rising) by the time, plays above-mentioned voltage and rises function.
In this case, rise in function in voltage, in the target voltage Vr for making generator 3 according to the ascending amount of revolving speed Sm
When rising, as revolving speed Sm be more than steady running when rated speed (rated value) S0 the case where occur.
In such case, in the midway for increase target voltage Vr based on elevational relationship figure M2, reach specified in revolving speed Sm
After revolving speed S0, using timer function N, increase over time and gradually target voltage Vr.Utilize the timer
The rate of climb of the target voltage Vr of function N, such as can be set to the upper raising speed with the target voltage Vr in elevational relationship figure M2
It spends identical.It is contemplated that various conditions determine the rate of climb of target voltage Vr caused by timer function N.
In Fig. 4, in order to show each relational graph M1, M2, for timer function N, showing in revolving speed Sm is rated speed
Target voltage Vr as rising immediately when S0.In fact, timer function N determines the change of the passage of target voltage Vr relative time
Change amount, Fig. 4 are not showed fully.Timer function N is configured to make target voltage Vr with defined rate of voltage rise
Rise.In addition, timer function N is also configured to the electricity of target when voltage rating V0 and revolving speed Sm being asked to reach rated speed S0
The difference for pressing Vr, determines rate of voltage rise, so that reaching voltage rating in opposite difference target voltage Vr after the stipulated time
V0。
It, can be in the midway revolving speed for increase based on elevational relationship figure M2 target voltage Vr by utilizing timer function N
When Sm is restored to rated speed S0, the state of affairs for sharp increase target voltage Vr is avoided.Thus, it is possible to prevent from generator 3
Unstable is become to the supply of the electric power of load 7.
Furthermore in the midway for increase target voltage Vr based on elevational relationship figure M2, reach rated speed S0 in revolving speed Sm
Before, elevational relationship figure M2 can also be replaced and utilize timer function.In addition, in the revolving speed Sm of decline maximum value, that youngest is not small
In the case where (the few situation of the slippage of revolving speed Sm), based on elevational relationship figure M2 make target voltage Vr rise midway, can
Carry out the prediction that revolving speed Sm is more than rated speed S0.In this case, can in timing appropriate, replace elevational relationship figure M2 and
Utilize timer function.
Elevational relationship figure M2 is utilized moreover, replacing, it can also be merely with timer function N.In this case, voltage rises
Function is configured to make the target voltage Vr of generator 3 to rise over time and gradually.In this case, can pass through
Various methods rise target voltage Vr.For example, can revolving speed Sm decline below allow change value S1 after rise again
When, maintain the state of target voltage Vr decline to make after revolving speed Sm is restored to rated speed S0 by timer function N always
Target voltage Vr gradually rises most voltage rating V0.Particularly, can target voltage Vr due to the decline of revolving speed Sm by
It is limited to after allowing lower voltage limit V1, waits revolving speed Sm to restore to specified turn in the state of maintaining to allow lower voltage limit V1 always
Fast S0 makes target voltage Vr gradually rise to voltage rating V0 by timer function N later.
In such case, by restoring target voltage Vr slowly, it can make to supply from the electric power of 3 pairs of generator loads 7
To stabilization.
Then, the control method for the electricity generation system 1 for having used control device 4 is illustrated referring to the flow chart of Fig. 5~Fig. 7.
Firstly, starting gas engine 2 in the state of being not connected with load 7 on generator 3, start the hair of generator 3
Electricity.In addition, the rated speed S0 of gas engine 2 and the target voltage Vr of generator 3 are set (Fig. 5 in control device 4
Step St1).At this point, target voltage Vr is set to voltage rating V0.In this mode, it is adjusted by the revolving speed of control device 4
Unit 44 is controlled, so that the revolving speed S of gas engine 2 is always rated speed S0, on the other hand, revolving speed S is because to power generation
The investment of machine 3 loads 7 and changes.
In addition, detecting revolving speed Sm in gas engine 2 by revolution counter 22 and being detected by voltmeter 31 defeated in generator 3
Voltage Vm (St2) out.Then, the revolving speed adjustment unit 44 of control device 4 is controlled, so that revolving speed Sm is rated speed S0,
In addition, the automatic voltage adjustment unit 42 of control device 4 is controlled, so that output voltage Vm is target voltage Vr (St3).
Then, control device 4 determines whether revolving speed Sm is rated speed S0, and whether output voltage Vm is target voltage Vr
(St4).Then, in the case where meeting the judgement, 4 operating breaker 5 of control device connects (investment) load 7 to generator 3
(St5 of Fig. 6).Furthermore the operation of the breaker 5 can also be carried out by operator.Furthermore the mark a expression of Fig. 5 is moved to figure
6 mark a.
When being connected to load 7 on generator 3, the output voltage V of the revolving speed S of gas engine 2 and generator 3 is sharp
Decline.Therefore, revolving speed adjustment unit 44 will make revolving speed Sm rated speed S0, in addition, automatic voltage adjustment unit 42 to make it is defeated
Voltage Vm is target voltage Vr out.Then, the aperture of throttle valve 21 becomes larger, and leads to the flow of the fuel gas of gas engine 2
Sharp increase.At this point, work of the control device 4 by target voltage adjustment unit 43 as shown below, suitably setting is sent out
The target voltage Vr of motor 3.
When being connected to load 7 on generator 3, control device 4 detects revolving speed Sm by revolution counter 22, passes through voltmeter 31
After detection output voltage Vm (St6), determines whether the revolving speed Sm of gas engine 2 declines below and allows change value S1 (St7).
Furthermore control device 4 also can be determined that whether the detected value of the frequency of generator 3 declines below and allow change value, replaces and turn
The judgement of fast Sm.The revolving speed Sm of gas engine 2 do not decline below allow change value S1 when, control device 4 is by generator 3
Target voltage Vr be maintained voltage rating V0 (St8).Then, the revolving speed adjustment unit 44 of control device 4 is controlled, so that
Revolving speed Sm is rated speed S0, in addition, the automatic voltage adjustment unit 42 of control device 4 is controlled, so that output voltage Vm
For target voltage Vr (St12).At this point, passing through the feedback control of automatic voltage adjustment unit 42, the output voltage V quilt of generator 3
It is maintained voltage rating V0.
On the other hand, in step St7, the revolving speed Sm of gas engine 2 decline below allow change value S1 when, control
Device 4 processed determines whether the target voltage Vr of generator 3 declines below based on allowing to carry out the normal operation of load 7
Output voltage V determined by allow lower voltage limit V1 (St9).In this case, it is not declined below in target voltage Vr
When allowing lower voltage limit V1, as voltage lowering action, control device 4 makes the target of generator 3 according to the slippage of revolving speed Sm
Voltage Vr declines (St10).At this point, specifically, as shown in Figure 3 or Figure 4, in the target voltage adjustment unit 43 of control device 4
The revolving speed Sm of reading is in the 2nd range R2, and in target voltage adjustment unit 43, revolving speed Sm and decline relational graph M1 are checked,
Target voltage Vr is calculated as lower than voltage rating V0 and the value to allow lower voltage limit V1 or more.
Then, the target voltage Vr of target voltage adjustment unit 43 is set in target voltage setup unit 41.Control
The automatic voltage adjustment unit 42 of device 4 is controlled, so that output voltage Vm is target voltage Vr (St12).At this point, passing through
The feedback control of automatic voltage adjustment unit 42, it is corresponding with the value that revolving speed Sm declines that the output voltage V of generator 3 is adjusted to
Suitable voltage.Furthermore revolving speed Sm drops to defined value, but the revolving speed adjustment unit 44 of control device 4 is controlled, so that
Revolving speed Sm is always rated speed S0.
Revolving speed Sm decline below allow change value S1 when, by making the target of generator 3 based on decline relational graph M1
Voltage Vr is drastically declined, and can be prevented in order to make the output voltage V target voltage Vr of generator 3 and to gas engine 2
Generate excessive burden.Thus, it is possible to protect gas engine 2 from overload, the stall of engine is prevented.Furthermore, it is possible to will
The decline of the revolving speed Sm of gas engine 2 is suppressed to minimum limit, shortens the recovery time of the revolving speed Sm of gas engine 2.
On the other hand, in step St9, target voltage Vr decline below allow lower voltage limit V1 when, in order to avoid
To the adverse effect of load 7, as voltage decline limitation movement, the target voltage Vr of generator 3 is maintained appearance by control device 4
Perhaps lower voltage limit V1 (St11).At this point, as shown in Figure 3 or Figure 4, being read in the target voltage adjustment unit 43 of control device 4
Revolving speed Sm is in the 3rd range R3, in target voltage adjustment unit 43, revolving speed Sm and decline relational graph M1 verification, and target electricity
Pressure Vr is acquired as lower voltage limit V1 is allowed.
Then, the target voltage Vr of target voltage adjustment unit 43 is set in target voltage setup unit 41.Control
The automatic voltage adjustment unit 42 of device 4 is controlled, so that output voltage Vm is target voltage Vr (St12).At this point, passing through
The feedback control of automatic voltage adjustment unit 42, so that the output voltage V of generator 3 is adjusted to allow lower voltage limit V1.Again
Person, revolving speed Sm drops to the value smaller than allowing lower limit rotating speed S2, but the revolving speed adjustment unit 44 of control device 4 is controlled, and is made
It obtains revolving speed Sm and is always rated speed S0.
In this way, in the apparent situation of decline of the revolving speed Sm of gas engine 2, by the target voltage for making generator 3
Vr will not excessive descent, will make target voltage Vr decline value be limited to allow lower voltage limit V1, can be by the target of generator 3
Voltage Vr is maintained the value needed to load 7 normal operation.
Then, after the revolving speed Sm of gas engine 2 is decline maximum value, rising is started again at.Until revolving speed Sm changes
Until the direction of rising (St13), step St6~St12 is repeated in control device 4.Whether revolving speed Sm changes to rising
The revolving speed Sm and this revolving speed Sm detected of last time detection are compared to judge in direction.
In the direction change that revolving speed Sm is ramped up (St13), as voltage vertical motion, control device 4 makes generator 3
Target voltage Vr (St14 of Fig. 7) is risen according to the ascending amount of revolving speed Sm.At this point, specifically, as shown in Figure 3 or Figure 4,
In target voltage adjustment unit 43, revolving speed Sm and elevational relationship figure M2 are checked, and calculate target voltage Vr.Furthermore the note of Fig. 6
Number b indicates the mark b for being moved to Fig. 7.
Revolving speed Sm decline below allow change value S1 after revolving speed Sm rise again when, make the target voltage of generator 3
Vr is based on elevational relationship figure M2 and slowly rises.Thus, it is possible to mitigate the burden of the burning in gas engine 2.
In addition, revolving speed Sm and output voltage Vm is detected (St15), determine whether target voltage Vr is voltage rating V0
(St16).In the case where target voltage Vr is not voltage rating V0, determine whether revolving speed Sm is rated speed S0 (St17).?
In the case that revolving speed Sm is not rated speed S0, until target voltage Vr be based on elevational relationship figure M2 restore be to voltage rating V0
Only, step St14~St17 is repeated.
In the case where target voltage Vr is not voltage rating V0, in the case where revolving speed Sm is rated speed S0, control
The target voltage adjustment unit 43 of device 4 replaces elevational relationship figure M2 and utilizes timer function N (St17).Then, target electricity
Press adjustment unit 43 to utilize timer function N, until target voltage Vr for until voltage rating V0, make target voltage Vr with when
Between process and gradually rise.Later, in the input for the stop signal for having electricity generation system 1, control device 4 is carried out for making
Control the processing terminated.
So, after target voltage Vr is reduced, output voltage V recovers to specified electricity by the recovery of revolving speed Sm
When pressing V0, in other words, the unstable transition state after the generating state of generator 3 is connected to load 7 from generator 3
It, can be from generator 3 to 7 stable supplying electric power of load when being restored to stable state.
Furthermore the flow chart of Fig. 5~Fig. 7 above-mentioned indicates an example of the control method of electricity generation system 1.Allowing to change
Value S1 is set to the upper raising speed of the case where value being relatively distant from rated speed S0, target voltage Vr in elevational relationship figure M2
The case where spending when comparing comparatively fast, not needing timer function N.
On the other hand, rise function (voltage vertical motion) as voltage, replace Fig. 7 and by the way that Fig. 8 shows merely with fixed
When device function N in the case where flow chart.The meaning that timer function N is indicated is as described above.
More than, according to the control device 4 and control method of the electricity generation system 1 of the method, by suitably setting generator 3
Target voltage Vr, the decline of the revolving speed Sm of gas engine 2 can be suppressed to minimum limit, protection gas engine 2 is exempted from
In overload, while the recovery time of the revolving speed Sm of gas engine 2 can be shortened, and can supplied from generator 3 in order to negative
The electric power for carrying 7 normal operation and needing.
Then, by be put on graphical representation generator 3 load 7 when, revolving speed S, target voltage Vr, output voltage
V, the Temporal changes of the flow Q of fuel gas.Fig. 9 indicates do not have the mesh of generator 3 in relation to target voltage adjustment unit
Mark voltage Vr is limited to allow the Temporal changes of the previous electricity generation system of the function of lower voltage limit V1.Figure 10 is to indicate related
Target voltage adjustment unit 43, which has, to be limited to the target voltage Vr of generator 3 to allow the method for the function of lower voltage limit V1
Electricity generation system 1 Temporal changes curve graph.
As shown in figure 9, passing through the burning of gas engine 2, the revolving speed S of gas engine 2 in previous electricity generation system
And after the output voltage V of generator 3 stabilizes to fixed value, by the operation of the breaker 5 of control device 4, load 7 is put into
To generator 3.At this point, the revolving speed S of gas engine 2 and the output voltage V of generator 3 are drastically declined, to make revolving speed S and defeated
Voltage V is rated speed S0 and target voltage Vr out, and the flow Q of fuel gas increases.
Then, by the work of target voltage adjustment unit, target voltage Vr is set according to the slippage of revolving speed S
It is low.So, it is set too low with target voltage Vr, the output voltage V considerable decrease of generator, in connection load 7,
There are the misgivings that required voltage in the operating of load 7 can not be supplied by electricity generation system.
On the other hand, as shown in Figure 10, in the electricity generation system of the method 1, by the burning of gas engine 2, firing
After the revolving speed S of the gas engine 2 and output voltage V of generator 3 stabilizes to fixed value, by control device 4 to breaker 5
Operation, load 7 are put into generator 3.At this point, gas engine 2 revolving speed S and generator 3 output voltage V sharp under
Drop, will make revolving speed S and output voltage V rated speed S0 and target voltage Vr, and the flow Q of fuel gas increases.
Then, it by the work of target voltage adjustment unit 43, is set in target voltage Vr according to the slippage of revolving speed S
When obtaining low, target voltage Vr can be made not to be set than allowing lower voltage limit V1 low.The output voltage of generator is prevented as a result,
V too greatly declines, and in connection load 7, required voltage in the operating of load 7 can be stably supplied by electricity generation system 1.
Furthermore the present invention is not only to be defined in embodiment, also constituted in range without departing from the spirit different
Embodiment.
Label declaration
1 electricity generation system
2 gas engines
3 generators
4 control devices
42 automatic voltage adjustment units
43 target voltage adjustment units
5 breakers
6 source power supplies
7 loads
Claims (8)
1. a kind of control device of electricity generation system is the power generation for carrying out generator for the burning by engine, from the hair
The control device for the electricity generation system that motor is supplied electric power by breaker to load,
The control device includes: automatic voltage adjustment unit, is controlled, so that the output voltage of the generator is described
The target voltage of generator；And target voltage adjustment unit, the target voltage of the generator is adjusted,
The target voltage adjustment unit includes
It is loaded being connected by the breaker to the generator, the frequency of the revolving speed of the engine or the generator
The detected value of any one declines below when allowing change value, makes the target voltage of the generator according to the detected value
Slippage and the voltage decline function of declining；
It declines below in the target voltage of the generator declined according to the slippage of the detected value based in order to carry out
In the case where allowing lower voltage limit determined by the normal operation of the load and the output voltage allowed, by the generator
Target voltage is maintained described and allows lower voltage limit or the voltage decline limitation function based on the value for allowing lower voltage limit to determine
Energy；And
The detected value decline below it is described allow that the detected value rises again after change value when, make the generator
The voltage until voltage rating when target voltage rises to steady running rises function.
2. the control device of electricity generation system as described in claim 1,
The voltage rises function and is configured to increased according to the ascending amount of the detected value target voltage of the generator,
The voltage rises the rising gradient of the ascending amount of the relatively described detected value of target voltage of in function, described generator
The downward gradient of the slippage of the detected value relatively more described than the target voltage of generator in voltage decline function, described is flat
It is slow.
3. the control device of electricity generation system as claimed in claim 2,
The voltage rise function in, be configured to make the target voltage of the generator according to the ascending amount of the detected value
When rising, in the case where rated value when the detected value is more than steady running or it is predicted to be the feelings more than the rated value
Under condition, increase over time and gradually the target voltage of the generator.
4. the control device of electricity generation system as described in claim 1,
The voltage rises function and is configured to increase over time and gradually the target voltage of the generator.
5. a kind of control method of electricity generation system is the power generation for carrying out generator by the burning of engine, from the generator
By the control method for the electricity generation system that breaker is supplied electric power to load,
It is being controlled, when so that the output voltage of the generator being the target voltage of the generator, is including:
It is loaded being connected by the breaker to the generator, the frequency of the revolving speed of the engine or the generator
The detected value of any one declines below when allowing change value, makes the target voltage of the generator according to the detected value
The voltage lowering action of slippage decline；
It declines below in the target voltage of the generator declined according to the slippage of the detected value based in order to carry out
In the case where allowing lower voltage limit determined by the normal operation of the load and the output voltage allowed, by the generator
Target voltage is maintained described and allows lower voltage limit or dynamic based on the voltage decline limitation of the value for allowing lower voltage limit to determine
Make；And
The detected value decline below it is described allow that the detected value rises again after change value when, make the generator
The voltage vertical motion until voltage rating when target voltage rises to steady running.
6. the control method of electricity generation system as claimed in claim 5,
In the voltage vertical motion, increased according to the ascending amount of the detected value target voltage of the generator,
The rising gradient of the ascending amount of the relatively described detected value of target voltage of generator in the voltage vertical motion, described
The downward gradient of the slippage of the detected value relatively more described than the target voltage of generator in the voltage lowering action, described is flat
It is slow.
7. the control method of electricity generation system as claimed in claim 6,
In the voltage vertical motion, increased according to the ascending amount of the detected value target voltage of the generator
When, in the case where rated value when the detected value is more than steady running or the case where be predicted to be more than the rated value
Under, increase over time and gradually the target voltage of the generator.
8. the control method of electricity generation system as claimed in claim 5,
In the voltage vertical motion, increase over time and gradually the target voltage of the generator.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017028142A JP6821464B2 (en) | 2017-02-17 | 2017-02-17 | Power generation system control device and control method |
| JP2017-028142 | 2017-02-17 | ||
| PCT/JP2018/005344 WO2018151233A1 (en) | 2017-02-17 | 2018-02-15 | Power generation system control device and control method |
Publications (2)
| Publication Number | Publication Date |
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| CN110214413A true CN110214413A (en) | 2019-09-06 |
| CN110214413B CN110214413B (en) | 2023-03-14 |
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| CN201880008757.1A Active CN110214413B (en) | 2017-02-17 | 2018-02-15 | Control device and control method for power generation system |
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| US (1) | US10804826B2 (en) |
| EP (1) | EP3570427B1 (en) |
| JP (1) | JP6821464B2 (en) |
| CN (1) | CN110214413B (en) |
| WO (1) | WO2018151233A1 (en) |
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| US11755100B2 (en) * | 2021-03-18 | 2023-09-12 | Dell Products L.P. | Power/workload management system |
| US11942891B2 (en) | 2021-06-15 | 2024-03-26 | Kohler Co. | Dynamic frequency to voltage ratio for regulator machine |
| CN113489395B (en) * | 2021-07-05 | 2023-05-16 | 重庆华世丹动力科技有限公司 | Large-range self-adaptive voltage regulating method for DC generator |
| EP4148974A1 (en) * | 2021-09-13 | 2023-03-15 | Liebherr-Components Colmar SAS | A controller for controlling an electrical power supply system |
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| Publication number | Publication date |
|---|---|
| JP2018133966A (en) | 2018-08-23 |
| US20200067438A1 (en) | 2020-02-27 |
| WO2018151233A1 (en) | 2018-08-23 |
| EP3570427B1 (en) | 2021-08-11 |
| EP3570427A4 (en) | 2020-01-15 |
| US10804826B2 (en) | 2020-10-13 |
| CN110214413B (en) | 2023-03-14 |
| JP6821464B2 (en) | 2021-01-27 |
| EP3570427A1 (en) | 2019-11-20 |
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